/* Simple JavaScript Inheritance
 * By John Resig http://ejohn.org/
 * MIT Licensed.
 */
// Inspired by base2 and Prototype
var initializing = false, fnTest = /xyz/.test(function() {
    xyz;
}) ? /\b_super\b/ : /.*/;

// The base Class implementation (does nothing)
Class = function() {
};

// Create a new Class that inherits from this class
Class.extend = function(prop) {
    var _super = this.prototype;

    // Instantiate a base class (but only create the instance,
    // don't run the init constructor)
    initializing = true;
    var prototype = new this();
    initializing = false;

    // Copy the properties over onto the new prototype
    for ( var name in prop) {
        // Check if we're overwriting an existing function
        prototype[name] = typeof prop[name] == "function" && typeof _super[name] == "function" && fnTest.test(prop[name]) ? (function(name, fn) {
            return function() {
                var tmp = this._super;

                // Add a new ._super() method that is the same method
                // but on the super-class
                this._super = _super[name];

                // The method only need to be bound temporarily, so we
                // remove it when we're done executing
                var ret = fn.apply(this, arguments);
                this._super = tmp;

                return ret;
            };
        })(name, prop[name]) : prop[name];
    }

    // The dummy class constructor
    Class = function() {
        // All construction is actually done in the init method
        if (!initializing && this.init)
            this.init.apply(this, arguments);
    }

    // Populate our constructed prototype object
    Class.prototype = prototype;

    // Enforce the constructor to be what we expect
    Class.constructor = Class;

    // And make this class extendable
    Class.extend = arguments.callee;

    return Class;
};

if (!(typeof exports === 'undefined')) {
    exports.Class = Class;
}
